Q: I have little black gas smoke in my muffler

asked by on October 11, 2016

I have little black gas smoke in my muffler. Why?

My car has 320000 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Are Power Car Windows Safer?
Power windows are a convenience feature, though there are elements of passenger safety that are incorporated. Power windows can be controlled by the driver, so if a passenger opens the car window when they shouldn’t, the driver can close it....
My car shakes sometimes when in stop-and-go traffic
Hello, thanks for writing in. For an issue like this we usually need to start by scanning the computer for codes. This will allow the mechanic to see if the computer is seeing any problems. If there are no codes...
my car cannot move even on drive or reverse. it is not responding to gears
Hi there. It sounds like there could be a serious transmission issue at hand. However, there are a few other possibilities: a broken shifter cable or switch assembly. Does the gear indicator change when the shifter is moved? If not,...
Ran car with no oil, car stopped on hwy what to do now?
Hello There, Unfortunately, it sounds like your car may have had some catastrophic damage due to running it without any oil. Depending on how long and how low the oil levels were when you drove it prior to it shutting...
1995 f150 Possible blown head gasket
It sounds like you may in fact have a blown head gasket. A blown head gasket may cause a number of different symptoms. A head gasket that fails between cylinders will generally cause a misfire and potentially compression leaks from...
Was I given correct advice about my 2013 Kia Soul?
As you may know, there are a multitude of engine oils on the market all claiming to be the "best" and prolonging the life of your car's engine. One of the main questions you will be asked when changing your...
If u replace one motor mount should u do the rest?
Hi Kara. Thanks for contacting us tonight. When you replace one motor mount, it is best practices to replace them all at the same time, as the others will quickly break if not replaced.
I torqued the axle nut on my 1996 BMW 328i to the spec of an M3 and want to know if I may have damaged the axle in some way.
Hi Marvin. Thanks for contacting us today. The main cause of over-torquing is using an impact or air wrench. However, the majority of damage occurs when the torqued component is in use, develops heat then cools. In your situation, catching...
My car makes a short squeak noise when I start it. Lasts about half a second. My cousin pointed it out and since then I’m worried.
Squeaking is often drive belt or pulley related but in your case the starter motor would have to be considered as well. If the starter turns, or you hear significant noise at starting, but the engine literally is not turning...

Related articles

What Does a Catalytic Converter Do?
The The modern automotive exhaust system is much more advanced than what was available even just a couple of decades ago. After recognizing that the average automobile was one of the primary sources of global pollution, the US government enacted...
The Best Used Cars to Buy for Dog Owners
Dog Dog owners are a special breed of drivers. When they shop for a used car they have a list of requirements that can be quite different from other drivers, which tends to make the process a bit of a...
Top Automotive News & Stories: September 24-September 30
Angry Civic Type R, 350 special edition Ferraris, Infiniti variable compression tech, Mercedes' electric future, and more.